| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 770946 | Engineering Fracture Mechanics | 2012 | 13 Pages |
A new approach for determining initiation fracture toughness Ji has been developed based on acoustic emission (AE) and has been tested and validated on a SA333 Gr.6 steel. The Ji values thus determined are in close agreement with those obtained from both ASTM A-15 prescription and stress zone height (SZH) measurements using a constraint factor M = 4. This confirms the use of higher values of M (>2) in the blunting line equation J = MσyΔa where M is the slope of the blunting line, σy is the effective yield strength, and Δa is the crack extension.
► Acoustic emission (AE) study during fracture toughness tests of SA333 Gr.6 steel. ► Double differentiation of AE signals to determine fracture toughness (Ji). ► AE based Ji values in close agreement with A-15 procedure and SZH measurements. ► Constraint factor M used in blunting line equation is 4. ► This study confirms use of higher values of M (>2) in blunting line equation.
